WO1998020623A3 - System and method of downconversion where the received signal is downconverted - Google Patents

System and method of downconversion where the received signal is downconverted Download PDF

Info

Publication number
WO1998020623A3
WO1998020623A3 PCT/NO1997/000292 NO9700292W WO9820623A3 WO 1998020623 A3 WO1998020623 A3 WO 1998020623A3 NO 9700292 W NO9700292 W NO 9700292W WO 9820623 A3 WO9820623 A3 WO 9820623A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
downconversion
received signal
frequency
transmitted
Prior art date
Application number
PCT/NO1997/000292
Other languages
French (fr)
Other versions
WO1998020623A2 (en
Inventor
Tor Kveim
Terje Roeste
Original Assignee
Nera Asa
Tor Kveim
Terje Roeste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nera Asa, Tor Kveim, Terje Roeste filed Critical Nera Asa
Priority to US09/297,275 priority Critical patent/US6516023B1/en
Priority to AU47952/97A priority patent/AU4795297A/en
Priority to EP97910642A priority patent/EP0976202A2/en
Publication of WO1998020623A2 publication Critical patent/WO1998020623A2/en
Publication of WO1998020623A3 publication Critical patent/WO1998020623A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/408—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency the transmitter oscillator frequency being identical to the receiver local oscillator frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transceivers (AREA)

Abstract

A system and method for simultaneous transmission and receival where the received signal (24) is downconverted in a downconverting unit (25) by using a portion (35) of the transmitted modulated signal (31) as LO for the downconversion. The downconversion is performed to an intermediate frequency signal (26) having a frequency (f2)-(f1) equal to the difference between the frequency (f2) of the transmitted signal and the frequency (f1) of the received signal. There is provided a common antenna (20) for transmitting and receiving, and a duplex filter (21) in front of the antenna (20) to separate the transmitted signal (29) and the received signal (22), with the transmitter data (34) on the transmitter side having been applied to a modulator (33). In front of the duplex filter on the transmitter side is provided a power amplifier (30). On the receiver side there is, in addition, provided a demodulator (27) to permit withdrawal of user data (28) for the user on the receiver side. Compensation for the modulation introduced by the signal (35) in the downconversion unit (25) is provided in the receiver by a device where the transmitted phase (46a) is used as a reference, delayed in a time delay unit (53) by an appropriate delay, and where this delay unit may be estimated and updated in order to compensate for variable delay in the outer signal path.
PCT/NO1997/000292 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted WO1998020623A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US09/297,275 US6516023B1 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted
AU47952/97A AU4795297A (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted
EP97910642A EP0976202A2 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO964695A NO305499B1 (en) 1996-11-06 1996-11-06 Downconversion system and method in which the received signal is downconverted
NO964695 1996-11-06

Publications (2)

Publication Number Publication Date
WO1998020623A2 WO1998020623A2 (en) 1998-05-14
WO1998020623A3 true WO1998020623A3 (en) 1998-07-09

Family

ID=19900011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000292 WO1998020623A2 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted

Country Status (5)

Country Link
US (1) US6516023B1 (en)
EP (1) EP0976202A2 (en)
AU (1) AU4795297A (en)
NO (1) NO305499B1 (en)
WO (1) WO1998020623A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343567B (en) * 1998-11-05 2002-03-20 Nec Technologies Digital transmit loop
FI112741B (en) * 1998-11-26 2003-12-31 Nokia Corp Method and arrangement for transmitting and receiving RF signals at various radio interfaces of communication systems
US6516183B1 (en) * 1999-09-10 2003-02-04 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for disturbance compensation of a direct conversion receiver in a full duplex transceiver
US6597459B2 (en) 2000-05-16 2003-07-22 Zygo Corporation Data age adjustments
GB2363267B (en) * 2000-06-07 2002-08-07 Motorola Israel Ltd Circuit and method for signal phase control in a radio transceiver
US6735181B1 (en) * 2000-06-26 2004-05-11 Atmel Corporation Wireless transceiver with subtractive filter compensating both transmit and receive artifacts
US7519333B2 (en) * 2000-07-03 2009-04-14 Texas Instruments Incorporated Radio architecture for use with frequency division duplexed systems
US6975406B2 (en) 2001-08-02 2005-12-13 Zygo Corporation Glitch filter for distance measuring interferometry
JP2006261714A (en) * 2005-03-15 2006-09-28 Renesas Technology Corp Semiconductor integrated circuit for communication and portable communication terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171997A1 (en) * 1984-08-09 1986-02-19 BRITISH TELECOMMUNICATIONS public limited company Duplex microwave equipment with a single microwave oscillator
GB2228379A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
GB2228378A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
US5493701A (en) * 1991-08-29 1996-02-20 Nokia Telecommunications Oy Frequency-modulated transceiver having a third mixer for generating an outermediate-frequency local oscillator signal from modulated output signal of a high frequency oscillator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422909A (en) * 1993-11-30 1995-06-06 Motorola, Inc. Method and apparatus for multi-phase component downconversion
US5966416A (en) * 1996-11-21 1999-10-12 Dsp Group, Inc. Verification of PN synchronization in a spread-spectrum communications receiver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171997A1 (en) * 1984-08-09 1986-02-19 BRITISH TELECOMMUNICATIONS public limited company Duplex microwave equipment with a single microwave oscillator
GB2228379A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
GB2228378A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
US5493701A (en) * 1991-08-29 1996-02-20 Nokia Telecommunications Oy Frequency-modulated transceiver having a third mixer for generating an outermediate-frequency local oscillator signal from modulated output signal of a high frequency oscillator

Also Published As

Publication number Publication date
NO964695D0 (en) 1996-11-06
WO1998020623A2 (en) 1998-05-14
NO305499B1 (en) 1999-06-07
NO964695L (en) 1998-05-07
AU4795297A (en) 1998-05-29
US6516023B1 (en) 2003-02-04
EP0976202A2 (en) 2000-02-02

Similar Documents

Publication Publication Date Title
WO1997044921A3 (en) Method and apparatus for communicating information using a data tuner
WO1998027663A3 (en) System for improving the quality of a received radio signal
EP0829970A3 (en) Dual mode transceiver for TDMA and FDD modes
CA2315489A1 (en) Radio communication apparatus and radio communication method
WO2000016525A8 (en) A system and method for sending and receiving data signals over a clock signal line
TW325609B (en) Multiple-modulation communication system
WO2001067648A3 (en) Method and apparatus for interleaved optical single sideband modulation
TW343414B (en) Transmission system, transmitter, receiver and method for multiplexed quadrature amplitude modulation (QAM) television transmission
AU7570796A (en) Method, transmitter and receiver for transmitting training signals in a tdma transmission system
WO1998010542A3 (en) Transmitting and receiving method and radio system
CA2073823A1 (en) Data communication system with automatic power control
WO2003017547A1 (en) Transmission device, reception device and radio communication method
EP0622910A3 (en) Time diversity transmission system for the reduction of adjacent channel interference in mobile telephone systems
EP1067699A3 (en) Spread spectrum communication system
WO1998020658A3 (en) Non-invasive powerline communications system
AU4541796A (en) Data transmission method, transmitter, and receiver
EP1225715A3 (en) Transmitter, receiver, and method
AU7302296A (en) Data transmission method, transmitter, and receiver
WO1998020623A3 (en) System and method of downconversion where the received signal is downconverted
IE781725L (en) Radio communications
CA2269055A1 (en) Method for the transmission of digital signals
WO2002009270A3 (en) System and apparatus for a direct conversion receiver and transmitter
AU2001227171A1 (en) Method for transmitting data by means of chaotic signals
WO2001028150A3 (en) Method and apparatus for eliminating the effects of frequency offsets in a digital communication system
WO1996008849A3 (en) A radio transmission system and a radio apparatus for use in such a system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC

AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 09297275

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1997910642

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1997910642

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1997910642

Country of ref document: EP